201221002120111 has 8 divisors (see below), whose sum is σ = 201308305996800. Its totient is φ = 201133707894840.

The previous prime is 201221002120013. The next prime is 201221002120153. The reversal of 201221002120111 is 111021200122102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201221002120111 - 2⁴⁷ = 60483513764783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201221002130111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39451350 + ... + 44258908.

It is an arithmetic number, because the mean of its divisors is an integer number (25163538249600).

Almost surely, 2^{201221002120111} is an apocalyptic number.

201221002120111 is a deficient number, since it is larger than the sum of its proper divisors (87303876689).

201221002120111 is a wasteful number, since it uses less digits than its factorization.

201221002120111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4825709.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 201221002120111 its reverse (111021200122102), we get a palindrome (312242202242213).

The spelling of 201221002120111 in words is "two hundred one trillion, two hundred twenty-one billion, two million, one hundred twenty thousand, one hundred eleven".